from an earlier post in this thread:
Earlier this year SWA had ~2,800 qualified applicants on file and historically they've had ~7,000 on file on any given day.
The FO who told me this said that both figures, the 13,000 resumes on file in 2007, and the 3,000 on file in 2017, were for qualified pilots. They met the minimum qualifications for AA.
Last year, I was reading the Hawaiian hiring thread. One of the Hawaiian pilots, said that in Jan of last year they had "thousands" of resumes on file, and by that same Spring, they had "hundreds".
Southwest is the oddity since about half of the regional pilot pool didn't have the requisite 1000 TPIC to even fill out an app, and some of those that did have the TPIC time do not want to spend the rest of their career on a 73 with a rumored 14-16 year upgrade and thus did not apply.
SWA dropped their 1000TPIC in 2016?, earlier this year??? The 1000TPIC is now "preferred".